involves models: manufactured before April 2009 Shanghai GM Buick New Regal sedan.
Symptom: jitter vehicle starting, the engine failure and an electronic stability system fault lamp lights. Storing engine system fault code P0011, P0013, P0014 and P0017, electronic braking force control system EBCM stored DTC U0100.
FIG 1
Faulty: first to confirm the meaning of each fault code. P0011mdash; mdash; intake camshaft position (CMP) system performance; P0013mdash; mdash; exhaust camshaft position (CMP) actuator solenoid control circuit; P0014mdash; mdash; exhaust camshaft position (CMP) system performance; P0017mdash ; mdash; crankshaft position (CKP) / exhaust camshaft position (CMP) correlation. Then dismantling the camshaft position actuator solenoid valve, the solenoid valve was found (FIG. 1) and an oil passage screen (FIG. 2) at a large number of hard particulate impurities, confirmed head I is left blank sand casting process. After cutting head, confirmed that the residual portion of the sand is more than the camshaft position actuator solenoid valve into the oil passage. It caused by residual sand intake camshaft and an exhaust camshaft position of the actuator position of the actuator failure.
FIG. 2
Countermeasure:
(1) Cleaning camshaft position actuator solenoid filter, cleaning the oil-related oil Road, replace the engine oil and oil filter.
(2) If the fault still exists, replacement camshaft position actuator solenoid valves and camshaft position actuator.
Note: the meaning of fault codes stored EBCM U0100 is ldquo; EBCM periodic monitoring information is not received ECM availability, electronic stability system will stop working rdquo ;. After the failure of the engine system of exclusion, fault code in the U0100 to clear the EBCM electronic stability system can return to work.
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